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Finding the Fourth Proportional to 5,321,671.68, 7,985,657.28 and 1,958,240.64

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Solution

The fourth proportional to 5,321,671.68, 7,985,657.28 and 1,958,240.64 is: 2,938,519.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321,671.68 : 7,985,657.28 = 1,958,240.64 : x
  2. Step 2: Convert to fraction form
    5,321,671.68/7,985,657.28 = 1,958,240.64/x
  3. Step 3: Cross multiply
    5,321,671.68x = 7,985,657.28 × 1,958,240.64
  4. Step 4: Simplify right side
    5,321,671.68x = 15,637,838,622,807.86
  5. Step 5: Solve for x
    x = 15,637,838,622,807.86/5,321,671.68
  6. Step 6: Final answer
    x = 2,938,519.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.